The vortex doesn't have a knob, its a lever you push down, which I believe is designed to either be fully open or fully closed. So doesn't that mean adjustment can only be done via tyre pressure?
@Hovis started
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The vortex doesn't have a knob, its a lever you push down, which I believe is designed to either be fully open or fully closed. So doesn't that mean adjustment can only be done via tyre pressure?